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Mastech MS2140A, Manual, Page: 9 / 15

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Mastech MS2140A Manual Download Page 9

13

14

3.2.7.3 Frequency Through “HZ” Mode:

- Input signal: VPP 3V square wave; Overload 
  Protection: 250V DC or AC (RMS)

3.2.8 Duty Cycle

Accuracy

Resolution

 Range

5-95%

±3.0% 

0.1% 

Accuracy

Resolution

 Range

0.01Hz

60Hz

±(0.3% of r 5 digits)

0.1Hz

1Hz

0.01kHz

60kHz

600Hz

6kHz

0.1kHZ

1kHZ

0.01MHZ

60MHZ

600kHZ

6MHZ

Accuracy

Resolution

 Range

±(0.8% of r 3 digits)

3.2.9 Resistance

±(1.2% of r 3 digits)

60M

Ω

600

Ω

6k

Ω

60k

Ω

600k

Ω

6M

Ω

0.001k

Ω

0.1

Ω

0.01k

Ω

0.1k

Ω

0.001M

Ω

0.1M

Ω

- Overload protection: 250V DC or AC (RMS)

When measuring frequencies > 60KHz, duty cycle 
measurement range is 10 to 90%

3.2.11 Capacitance

- Overload protection: 250V DC or AC (RMS)

3.2.12 Diode 

Accuracy

Resolution

Range

- 

Forward DC current: about 1mA

- Open circuit voltage: about 2.8V
- Overload protection: 250V DC or AC (RMS)

0.001V

Displays approximate 
forward voltage.

Accuracy

Resolution

 Range

3.2.10 Continuity

- Overload protection: 250V DC or AC (RMS)
- Open circuit voltage: about 3V

0.1

Ω

The Meter will beep if 
measurement is less 
than 50

Accuracy

Resolution

 Range

±(4.0% of r 5 digits)

6nF

60nF

600nF

6µF

60µF

600µF

6mF

60mF

0.001nF

0.01nF

0.1nF
0.001µF

0.01µF

0.1µF

0.001mF

0.01mF

±(5.0% of r 5 digits)

Summary of Contents for MS2140A

Page 1: ... CAT ll 1000V A Hz MS2140A T RMS Inrush TEMP Hz μA Ω A V REL ZERO FUNC INRUSH HOLD RANGE MIN MAX COM Temp μAHz ΩV RELINP MAX MIN C kHz F µmVA nµmF MkΩHz AUTO K T NCV MAX 1000V Press 2Sec CAT lll 600V 600A TRMS AutoRange C US intertek 3080912 ...

Page 2: ...rement 4 3 16 Backlight and Clamp light 4 4 17 Maximum Minimum recording 4 5 17 Function switching 4 6 17 ZERO REL 5 Maintenance 24 5 1 24 Replacing the batteries 5 2 25 Test Leads Replacement 6 25 Accessories 4 7 18 INRUSH 4 8 18 Auto Power Off 4 9 18 Measuring Preperation 4 10 19 Current Measurement 4 11 19 Voltage Measurement 4 12 20 Frequency and Duty Cycle 4 13 20 Resistance 4 14 21 Diode Tes...

Page 3: ...oltages above 60V DC or 30V AC RMS Keep fingers behind the probe barriers while measuring 1 2 4 The symbol next to the input lead shows that the input voltage or current should not exceed the specified value in order to protect the internal circuit from damage 1 2 5 Choose the highest range when the value to be measured is unknown 1 2 6 Remove test leads before switching functions on the rotary sw...

Page 4: ...he meter can be cleaned with a soft cloth to remove any oil grease or grime Do not use liquid solvent or detergent 1 4 5 When the instrument is not in use turn rotary switch to OFF 1 4 6 If the instrument is not to be used for an extended period of time remove the batteries to prevent damage to the instrument 1 4 Maintenance 2 Features and Components The CM660 is a portable hand held yet professio...

Page 5: ...ets 7 Clamp trigger 8 Clamp for current measurement 2 1 Components 1 2 3 4 5 6 7 8 CAT ll 1000V A Hz MS2140A T RMS Inrush TEMP Hz μA Ω A V REL ZERO FUNC INRUSH HOLD RANGE MIN MAX COM Temp μAHz ΩV RELINP MAX MIN C kHz F µmVA nµmF MkΩHz AUTO K T NCV MAX 1000V Press 2Sec CAT lll 600V 600A TRMS AutoRange C US intertek 3080912 ...

Page 6: ...w Battery NCV Ω kΩ MΩ 07 08 2 3 Display Description 2 2 Buttons and switches RANGE button backlight switch ranges in manual mode FUNC button switch measurement functions HOLD button hold reading on screen REL ZERO button relative reading DC zero offset INRUSH button measure Inrush current MAX MIN button switch between max min readings Rotary Switch switch between measurements INPUT jack voltage cu...

Page 7: ... Size 238 92 50mm Weight 420g Including battery The Meter should be calibrated annually between 18 C 28 C and a relative humidity less than 75 3 1 General Specifications 3 2 Technical Specifications 3 2 1 True RMS Characteristics 3 2 1 1 For non sinusoidal signal measurements true RMS is a more accurate method of measurement over the averaging method 3 2 2 AC Current Accuracy Resolution Range 1 8 ...

Page 8: ...ear before the test leads make contact with the circuit This is normal since the Meter is highly sensitive When the test leads are connected to the circuit the true reading will be shown Input impedance 10MΩ Maximum input voltage 600V AC RMS or 600V DC Frequency range 50 60Hz 600mV range only by pressing RANGE button 3 2 7 Frequency Accuracy Resolution Range 0 01Hz 60Hz Measuring range 10Hz 1kHz I...

Page 9: ...ection 250V DC or AC RMS When measuring frequencies 60KHz duty cycle measurement range is 10 to 90 3 2 11 Capacitance Overload protection 250V DC or AC RMS 3 2 12 Diode Accuracy Resolution Range Forward DC current about 1mA Open circuit voltage about 2 8V Overload protection 250V DC or AC RMS 0 001V Displays approximate forward voltage Accuracy Resolution Range 3 2 10 Continuity Overload protectio...

Page 10: ...rn on the display backlight the backlight will stay on for 20 seconds before it is automatically turned off 2 When the backlight is on press the RANGE for 2 seconds to turn off the backlight 3 In current mode turning on the backlight will also trigger the clamp light Note Backlight clamp light uses and LED even though the light will auto off after 20 seconds use only when needed to conserve power ...

Page 11: ... difference of current reading and stored reading REL Output current reading reading when button pressed 2 REL can only perform under manual mode 4 6 ZERO REL 4 7 INRUSH When in AC Current measurement mode press the INRUSH button to enter surge current measurement mode Press button again to return to normal mode 4 8 Auto Power Off 1 When not in use the meter will automatically turn off after 20 mi...

Page 12: ...sitivity of the Meter The Meter will display correct reading once the leads are connected to the circuit 4 12 Frequency and Duty Cycle 1 Insert the black test leads into COM input and red test lead into INPUT input 2 Turn rotary switch to Hz position 3 Connect test leads to the voltage source or between loads Note Frequency range is 10Hz 60MHz For frequencies below 10Hz display will show 00 0 For ...

Page 13: ...tion and push FUNC three times for capacitance 3 Place leads at the terminals of the capacitor after it is fully discharged 4 Read the measurement from the display 4 17 Inrush Current Measurement 1 Turn rotary switch to A position 2 Push INRUSH button to enter inrush current mode 3 Open the clamp head by pressing the trigger and inserting the conductor to be measured 4 Power on the circuit being t...

Page 14: ...e to a live conductor AC voltage 90V the NVC indicator will flash and buzzer will sound Note 1 Even though there is no indication voltage may still exist Do not rely solely on NCV detector to determine the presence of voltage in a wire The measurement may be affected by the design of the outlet type of insulation and other external factors 2 The voltage sensing indicator may turn on when a voltage...

Page 15: ...ws Note Be sure to note the battery polarity when replacing 5 2 Test Leads Replacement REPLACE THE TEST LEADS WITH IDENTICAL OR COMPATIBLE LEADS LEAD SPEC 1000V 10A WARNING Replace new leads if the current leads are worn 6 Accessories 1 Test Leads Rating 1000V 10A 1 pair 2 User s Manual 1 pc 3 Batteries AAA Battery 3 pc 4 K type thermocouple 1 pc 5 Multi function socket 1 pc 00 05 3465 ...

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